Tracking Winter Weather and Frigid Temperatures Through This Weekend
A clipper storm will move across the Great Lakes through this weekend with periods of light snow, gusty winds, and lake effect snow bands which could make for hazardous travel at times. A frigid airmass will spread eastward behind this storm into the Midwest and Eastern U.S. through the weekend. Read More >
Hazardous Weather Conditions
Current conditions at
San Marcos, San Marcos Municipal Airport (KHYI)
Lat: 29.89°NLon: 97.86°WElev: 597ft.
Fair
44°F
7°C
| Humidity | 32% |
| Wind Speed | N 12 mph |
| Barometer | 30.20 in (1022.5 mb) |
| Dewpoint | 16°F (-9°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 17 Jan 2:56 am CST |
Extended Forecast for
4 Miles SW San Marcos TX
Red Flag Warning January 17, 10:00am until January 17, 08:00pm
Overnight
Low: 40 °F
Mostly Clear
Saturday
High: 56 °F
Sunny
Saturday Night
Low: 27 °F
Mostly Clear
Sunday
High: 61 °F
Sunny
Sunday Night
Low: 34 °F
Clear
M.L.King Day
High: 64 °F
Sunny
Monday Night
Low: 39 °F
Mostly Cloudy
Tuesday
High: 59 °F
Mostly Cloudy
Tuesday Night
Low: 50 °F
Cloudy then
Slight Chance
Showers
Detailed Forecast
Overnight
Mostly clear, with a low around 40. North wind around 10 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 56. North northeast wind 10 to 15 mph, with gusts as high as 30 mph.
Saturday Night
Mostly clear, with a low around 27. North northeast wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Sunday
Sunny, with a high near 61. Northwest wind 5 to 10 mph becoming south southwest in the afternoon.
Sunday Night
Clear, with a low around 34. South southwest wind around 5 mph.
M.L.King Day
Sunny, with a high near 64. West southwest wind 5 to 10 mph becoming east southeast in the afternoon.
Monday Night
Mostly cloudy, with a low around 39. East wind around 5 mph becoming north northeast after midnight.
Tuesday
Mostly cloudy, with a high near 59. North northeast wind around 5 mph becoming southeast in the afternoon.
Tuesday Night
A 20 percent chance of showers after midnight. Cloudy, with a low around 50. South southeast wind around 5 mph.
Wednesday
A 30 percent chance of showers. Mostly cloudy, with a high near 65.
Wednesday Night
Mostly cloudy, with a low around 49.
Thursday
Mostly sunny, with a high near 67.
Thursday Night
Partly cloudy, with a low around 42.
Friday
Mostly cloudy, with a high near 61.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles SW San Marcos TX
29.86°N 97.99°W (Elev. 748 ft)
29.86°N 97.99°W (Elev. 748 ft)
2:32 am CST Jan 17, 2026
3am CST Jan 17, 2026-6pm CST Jan 23, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
